why would Concerned Ape waste their time on Mac support when they can just make it PC exlusive and from that just make it look and play better... so with graphics maxed out the fixed hardware if the mac can't handle it

The graphics are 2D and pixel bits, there should be no reason that a regular pc or mac, or linux can't run it. I can run games like Heroes of Newerth on a mac so Stardew could definitely be handled on a mac